参考
https://praglowski.com/2016/05/10/your-first-erlang-application-with-rebar3
https://github.com/erlang/rebar3/issues/1740
https://www.rebar3.org/docs/basic-usage
项目实践
创建应用
根据目标，这里创建app类型的应用，当然也可以创建escript、lib、release、plugin类型的应用，这个要根据实际情况而定。关于应用类型，详情参考 docs.basic-usage
➜ projects rebar3 new app transaction_publish_service
===> Writing transaction_publish_service/src/transaction_publish_service_app.erl
===> Writing transaction_publish_service/src/transaction_publish_service_sup.erl
===> Writing transaction_publish_service/src/transaction_publish_service.app.src
===> Writing transaction_publish_service/rebar.config
===> Writing transaction_publish_service/.gitignore
===> Writing transaction_publish_service/LICENSE
===> Writing transaction_publish_service/README.md
修改rebar.config，增加依赖
➜ transaction_publish_service cat rebar.config
{erl_opts, [debug_info]}.
{deps, [{emqtt, {git, "https://github.com/emqx/emqtt", {tag, "v1.0.0"}}}]}.
{shell, [
% {config, "config/sys.config"},
{apps, [transaction_publish_service]}
]}.
➜ transaction_publish_service
编译构建
➜ transaction_publish_service rebar3 compile
===> Verifying dependencies...
===> Fetching emqtt (from {git,"https://github.com/emqx/emqtt",{tag,"v1.0.0"}})
===> Fetching gun v1.3.0
===> Version cached at /home/marco/.cache/rebar3/hex/hexpm/packages/gun-1.3.0.tar is up to date, reusing it
===> Fetching cowlib v2.6.0
===> Version cached at /home/marco/.cache/rebar3/hex/hexpm/packages/cowlib-2.6.0.tar is up to date, reusing it
===> Compiling cowlib
===> Compiling gun
===> Compiling emqtt
===> Compiling transaction_publish_service
➜ transaction_publish_service ls
_build LICENSE README.md rebar.config rebar.lock src
➜ transaction_publish_service tree _build
_build
└── default
└── lib
├── cowlib
│ ├── ebin
│ │ ├── cow_base64url.beam
│ │ ├── cow_cookie.beam
│ │ ├── cow_date.beam
│ │ ├── cow_hpack.beam
│ │ ├── cow_http2.beam
│ │ ├── cow_http.beam
│ │ ├── cow_http_hd.beam
│ │ ├── cow_http_te.beam
│ │ ├── cow_iolists.beam
│ │ ├── cowlib.app
│ │ ├── cow_mimetypes.beam
│ │ ├── cow_multipart.beam
│ │ ├── cow_qs.beam
│ │ ├── cow_spdy.beam
│ │ ├── cow_sse.beam
│ │ ├── cow_uri.beam
│ │ └── cow_ws.beam
│ ├── erlang.mk
│ ├── hex_metadata.config
│ ├── include
│ │ ├── cow_inline.hrl
│ │ └── cow_parse.hrl
│ ├── LICENSE
│ ├── Makefile
│ ├── README.asciidoc
│ └── src
│ ├── cow_base64url.erl
│ ├── cow_cookie.erl
│ ├── cow_date.erl
│ ├── cow_hpack.erl
│ ├── cow_http2.erl
│ ├── cow_http.erl
│ ├── cow_http_hd.erl
│ ├── cow_http_te.erl
│ ├── cow_iolists.erl
│ ├── cowlib.app.src
│ ├── cow_mimetypes.erl
│ ├── cow_mimetypes.erl.src
│ ├── cow_multipart.erl
│ ├── cow_qs.erl
│ ├── cow_spdy.erl
│ ├── cow_spdy.hrl
│ ├── cow_sse.erl
│ ├── cow_uri.erl
│ └── cow_ws.erl
├── emqtt
│ ├── ebin
│ │ ├── emqtt.app
│ │ ├── emqtt.beam
│ │ ├── emqtt_frame.beam
│ │ ├── emqtt_props.beam
│ │ ├── emqtt_sock.beam
│ │ └── emqtt_ws.beam
│ ├── include
│ │ └── emqtt.hrl
│ ├── LICENSE
│ ├── Makefile
│ ├── pre-compile
│ ├── README.md
│ ├── rebar.config
│ ├── rebar.config.script
│ ├── src
│ │ ├── emqtt.app.src
│ │ ├── emqtt.erl
│ │ ├── emqtt_frame.erl
│ │ ├── emqtt_props.erl
│ │ ├── emqtt_sock.erl
│ │ └── emqtt_ws.erl
│ ├── test
│ │ └── emqtt_frame_SUITE.erl
│ └── TODO
├── gun
│ ├── ebin
│ │ ├── gun.app
│ │ ├── gun_app.beam
│ │ ├── gun.beam
│ │ ├── gun_content_handler.beam
│ │ ├── gun_data_h.beam
│ │ ├── gun_http2.beam
│ │ ├── gun_http.beam
│ │ ├── gun_sse_h.beam
│ │ ├── gun_sup.beam
│ │ ├── gun_tcp.beam
│ │ ├── gun_tls.beam
│ │ ├── gun_ws.beam
│ │ └── gun_ws_h.beam
│ ├── erlang.mk
│ ├── hex_metadata.config
│ ├── LICENSE
│ ├── Makefile
│ ├── README.asciidoc
│ ├── rebar.config
│ └── src
│ ├── gun_app.erl
│ ├── gun.app.src
│ ├── gun_content_handler.erl
│ ├── gun_data_h.erl
│ ├── gun.erl
│ ├── gun_http2.erl
│ ├── gun_http.erl
│ ├── gun_sse_h.erl
│ ├── gun_sup.erl
│ ├── gun_tcp.erl
│ ├── gun_tls.erl
│ ├── gun_ws.erl
│ └── gun_ws_h.erl
└── transaction_publish_service
├── ebin
│ ├── transaction_publish_service.app
│ ├── transaction_publish_service_app.beam
│ └── transaction_publish_service_sup.beam
├── include -> ../../../../include
├── priv -> ../../../../priv
└── src -> ../../../../src
17 directories, 101 files
➜ transaction_publish_service
escript类型的应用创建
➜ erlang rebar3 new escript hello
===> Writing hello/src/hello.erl
===> Writing hello/src/hello.app.src
===> Writing hello/rebar.config
===> Writing hello/.gitignore
===> Writing hello/LICENSE
===> Writing hello/README.md
➜ erlang ls
emqtt emqx emqx-rel erlang-learning file_client file_service hello helloworld jaerlang2 learn-you-some-erlang tutorails
➜ erlang cd hello
➜ hello ls
LICENSE README.md rebar.config src
➜ hello cd src
➜ src ls
hello.app.src hello.erl
➜ src cat hello.erl
-module(hello).
%% API exports
-export([main/1]).
%%====================================================================
%% API functions
%%====================================================================
%% escript Entry point
main(Args) ->
io:format("Args: ~p~n", [Args]),
erlang:halt(0).
%%====================================================================
%% Internal functions
%%====================================================================
➜ src cd .,.
cd: no such file or directory: .,.
➜ src cd ..
➜ hello ls
LICENSE README.md rebar.config src
➜ hello rebar3 escriptize
===> Verifying dependencies...
===> Compiling hello
===> Building escript...
➜ hello _build/default/bin/hello
Args: []
➜ hello _build/default/bin/hello helloworld
Args: ["helloworld"]
➜ hello
